Artists Wanted, Under Age 200

The European Fine Art Fair, famed for decades for its offerings of Old Masters, now features such moments as three veteran collectors gathered around a dead frog.

"I just can't get into a dead frog," said one, walking away. But three other buyers at Tefaf bought an edition of "Transforming Vanitas Painting" (2012-13), Rob and Nick Carter's three-hour loop of an animated dead frog decomposing. The video loops sold...